Source : Webster's Revised Unabridged Dictionary (1913)

Thenal \The"nal\, Thenar \The"nar\, a. [NL., fr. Gr. ?.] (Anat.)
   Of or pertaining to the thenar; corresponding to thenar;
   palmar.

Source : WordNet®

thenal
     adj : of or relating to the palm of the hand or to the area at the
           base of the thumb [syn: {thenar}]